Stoker for furnaces.



PATENTED JUNE 19m'.

Non 855,581..

H. A. MAOGLYMENT.

STOKBR FOR FURNAGES.

APPLICATION FILED 119150.29. 1905.

5 SHEETS-SHEET 1A PATENTED dum; 4, 1907.

H. i MAOGLYMBNTJ OR PURNACES if! -ILEI) DEO. 29, 1905.

6 SHEETS-SHEET 2V No, 355,591. PATENTED JEUNE 4, 19o? H. MAGGLYMENT.

STOKER FOR FURNAGES. APLIGATION PILBDDEG. 29. 1905.

5 SHEETS-SHEET ,-3.

PATENTED lJUNE 4, 1907.

H. A. MAOGLYMENT.

STOKER FOR FURNAUBS.

APPLICATION FILED DEO. 29, 1905.

6 SHEETS-SHEET 4,

5 w JW PML-mun JUNE 4, 1907.

H. A. MAGGLYMENT.

STGKER POR FURNACES.

APPLIOATION FILED 13120.29. 1905.

5 SHEETS-SEEE; 5.

. ends, forthe purpose of assisting the fuel in' UNITED sTainsI .HARRY A. MACCLYMENT,-OFBURLINGTQN iowa@- PATENT oFF-ion.

STOKER FOR FURNACES.

Speci'cation of Letters Patenti Aiiiilicazioii tiled December 29, 1905. /SeriallNm 293.77%. l A' To fall 'whom it may ermee/41,.'

Be it known that I, HARRY A. MACCLY- MENT, a citizen of the United States, residing at Burlington, in the county of Des Moines tudinal section on the line 2 o f Fig. y1. Fig. 3

. is a transverse section on the line 3 of Fig. 1. l* ig. 4 is an elevation of my improved Stoker..

Fig. 5 is a section on the line 5 ofFig. 4. Figi 6 is a longitudinal sectional viewofa modified forni of iny invention. Fig- 7 is a. section through Fig. 6 n the line 7.

' My' improved Stoker is applicable to any foi-in of furnace, but? inthe drawingsIf-have shown `it as in vconnection with the furnace 0f. 'a locomotive boiler. It is to be understood,

however, that /i'tfniay equally well be attached to stationary or marine boilers, or to any furnace in wliicliit is desirable to supply fuel to grates of large area.

ln the following description I shall refer only to the partso'ii'the drawings, which I re gard as new, since the construction of the loconiotive. shown is of the. o i'dinary kind and well understood.

ln the drawings c represents a hopper through which fuel usually in the shape of linely divided coal is supplied to a receptacle or main fuel supply l). Leading from this recept aclc is a magazine. c terminating at its end opposite the fuel'supply in an opening c in the gratej', as clearly shown in Fig. l. lclow this magazine and opening similarly into the niain fuel supply isa receptacle c', which l designate t-lie auxiliary fuel chamber. 'lhis auxiliary fuel chamber is provided at its end opposite the main fuel supply with an opening c" leading to a second magazine cl similar to that ii'st'. desci'ibed, lthis second magazine. also terminating at its upper end in an opening c in the grate. It will be. observed that these magazines are made Haring so that their upper ends are larger than their lower its passagew -as is well understood in this art. As shown in Fig. 2. the main fuel supply Fig. 2 is a longihas at its rear'wall openingstlirougli'.which plungers (l d. operate..I These' plungers are connected toa plungerlhead dzwvhiclimay be operated in. any desired inanner A I `have lshown an eccentric e, but it will be'readily understood any suitable operating means may be substituted therefor.; The upper plunger d serves to force the fuel. from; the main fuel supply vinto the magazine c and the lower plunger (l serves to force theffuelffrom the main vsupply intothe auxiliary cliainber c. The fuel in the. magazines4 as the. 'p1un gersoperat'e is graduallycarried.upward to the grate through the opening.therennzwhere it is burned-as is well understoodi The-fuel in the auxiliary fuel chaniber' islforcedgforward graduallyby the lo\\jerph1i.,iger vduiitil it reaches theopening cf wvlicncc.-it-falls'into the iiia'gazine c2. Connected-also f'w'itlt the plunger head d? ,bya long4 plunger annui? is an auxiliary phingendf, -and this Vplunger d contacts with the fuel at theopeninglcf-and forces it into ,the magazine ci ftlience tothe grate. It will be readily, understoodthatby providing the vauxiliarygchamber.c and causing tho-fuel to be fed-first thereintofand thence into the ini'igazinecfl ain,enab 1ed to transfer tliefuelfor a considerabledistance from its source of supply, wliiclrwould. be practically impossible were thefnel delivered directly from the main supply into the mage:

In such case, 1 t would be necessary zine ci. to elongate the magazine so as to connect it directly to the niain supply,and it would be found practically impossible to force the fuel through so long a course by one of the small plungers d.

Referring to Fig. 7 [have shown a modilication of my invention which utilizes the screw conveyor c for forcing the fuel through the chamber j" to the magazine c and the screw eonveyer c2 to force the fuel through the much longer conveyor j" tothe magazine c".

By reference to Fig. 1, it will be observed that the openings in the grate'are circular IOO- or approximately so. v'llie fuel, therefore,

coming through these openings is distributed entirely around the opening and is spread evenly over the live. grate arca.

'lhough l have shown but two magazines, it will bc readily understood that inore'inay be provided if desired with the necessary auxiliary fuel chambers and plungcrs. By the use of a plurality of magazines and the operating means for feeding the fuel, which I IiO I have described, I am enabled to feed fuel to the grate surfaces of larger area than has hitherto been possible.

I ani aware that prior to my invention it has been proposed 'to transfer fuel from a source of supply to a grate by means of lungers, but so far as I am aware it has not )een possible hitherto 'to use more than one plunger or to distribute the fuel to more than one point in the grate. I have shown and described the device containing the auxiliary fuel chamber and the multiple plungers as the best forin of' my invention. My invention, however, in its broad as lct is not liniited to this construction. Ior example, I may, if so desired, omitA the auxiliary fuel chamber and convey the fuel directly from the source of supply to the multiple grate openings by means of the screw eonveyers s own in Fig. 6. .In this figure a represents the hopper, b the main fuel receptacle and ele' represent. screw conveyors -conveying the coall through passageways j" j, re-

-s etively,' to the magazines c c?. By using t ie screw conveyors the fuel may be 4.transferred. directly from the main supply tothe most distant magazine without the use of an intermediate fuel chamber, biit the feediin some respects is not so satisfactory as the plunger feed. It will be understood that in the -modification of my invention shown in Fig. '-the parts a, l, c and c correspond to the similar parts.shown in the other figures.

The advantages of my construction are sufficiently lobvious without further description.

It will be understood that I desire to cover in claims such variations from the construetion which I have shown and described as may properly fall within the spirit and scope of my-invention.

I claim:

1.'In combination with a furnace having a grate, a fuel supplying means, magazines leading therefrom to isolated parts of the grate, and means outsidesuch magazines for forcing fuel in equal quantities through the different magazines.

2. A furnace having a grate provided with a plurality of openings,.a source of fuel supply, a magazine directly connecting one of the openings with the fuel supply, a maga` zine connected to another opeiing, an auxiliary fuel chamber between this last niagazine and the fuel supply, and means for moving fuel from the supply to the grate.

3.-In combination with a furnace, a. source of fuel supply, an auxiliary storage. chamber,

a tube leading from such source to the auxv iliary storage. chamber, means outside such tube for forcing fuel into the auxiliary storage chamber, and means for conveying the fuel thence to the furnacegrate.

4. In combination with a furnace, a source of fuel sup ly, an auxiliary storage chamber, a tube leaili iary storage chamber, means outside such tube for forcing fuel into the auxiliary storage chamber, a second tube leading therefrom to-the furnace grate, and means outside the second tube for forcing fuel to the grate.

HARRY A. MACULYMEN'.

Witnesses; A. U. WiNKLEiz., J. A. CARNEY.

ng from such source to the auxil- 

